Stannah 600 Options PCB Located within the Stannah 600 carriage unit Circuit Board that connects to the Main PCB of the Stannah 600 Stairlift Used for Powered Options such as Powered Swivel and Powered Footplate Simple & Easy to fit Please note there are 3 different versions of the Stannah 600 Main PCB & Options PCB available – Blue & Red versions are not compatible with the Green Version